Answer:
 Rechargeable batteries can still go flat after repeated use because the materials involved in the reaction lose their ability to charge and regenerate
Explanation:
they go flat because they a rechargeable and sometimes don't always work
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We are given with the expression d = ut + 0.5 at^2 and is asked to express the equation in terms of a. First, we transpose ut to the left side, then we multiply to the equation and divide lastly the resulting equation by t^2. The final expression becomes a = 2(d-ut)/t^2.
        
             
        
        
        
Answer:
The magnitude of  is 4 V and phase of input voltage is zero
 is 4 V and phase of input voltage is zero
Explanation:
Given:
Output voltage 
Resistance  kΩ
 kΩ
Voltage gain 
For finding feedback resistance we use gain equation
Gain equation for non inverting op-amp is given by,
      
    
       ≅ 10 kΩ
 ≅ 10 kΩ
For finding input voltage we use,
    
     
      V
 V
The Phase of  is zero because output voltage phase is 360°
 is zero because output voltage phase is 360°
Therefore, the magnitude of  is 4 V and phase of input voltage is zero
 is 4 V and phase of input voltage is zero
 
        
             
        
        
        
Explanation:
a) Density is the amount of mass in a specific amount of volume
b) Some substances are less dense than water so will float and vice versa 
c) The wooden plank has less density than water due to having larger volume and vice versa with the wooden block since volume and density are inversely proportional
II) (a) They are all metals 
(b) water -> Compound 
oxygen -> Element 
Gold-> Element 
Salt-> Compound 
 
        
                    
             
        
        
        
Energy of a random atomic and molecular is called molecules energy